Título:
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Model dependence of the neutron-skin thickness on the symmetry energy
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Autor/a:
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Mondal, C.; Agrawal, B. K.; Centelles Aixalà, Mario; Colò, G.; Roca Maza, Xavier; Paar, N.; Viñas Gausí, Xavier; Singh, S. K.; Patra, S. K.
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Otros autores:
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Universitat de Barcelona |
Abstract:
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The model dependence in the correlations of the neutron-skin thickness in heavy nuclei with various symmetry-energy parameters is analyzed by using several families of systematically varied microscopic mean-field models. Such correlations show a varying degree of model dependence once the results for all the different families are combined. Some mean-field models associated with similar values of the symmetry-energy slope parameter at saturation density L , and pertaining to different families, yield a greater-than-expected spread in the neutron-skin thickness of the 208 Pb nucleus. The effective value of the symmetry-energy slope parameter L eff , determined by using the nucleon density profiles of the finite nucleus and the density derivative S ′ ( ρ ) of the symmetry energy starting from about saturation density up to low densities typical of the surface of nuclei, seems to account for the spread in the neutron-skin thickness for the models with similar L . The differences in the values of L eff are mainly due to the small differences in the nucleon density distributions of heavy nuclei in the surface region and the behavior of the symmetry energy at subsaturation densities. |
Materia(s):
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-Teoria del funcional de densitat -Simetria (Física) -Density functionals -Symmetry (Physics) |
Derechos:
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(c) American Physical Society, 2016
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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American Physical Society
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